How to reset Mysql Root password

How to reset Mysql Root password:-

[root@server1 ~]# mysql -u root -predhat

To change root password.
mysql> update user set Password=PASSWORD('newpassword') WHERE User='root';
Query OK, 4 rows affected (0.02 sec)
Rows matched: 4  Changed: 4  Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

If root password is not available or its lost but we need to reset it, follow this.

[root@server1 ~]# service mysql stop
Shutting down MySQL..[  OK  ]
[root@server1 ~]# mysqld_safe --skip-grant-tables &
[1] 7670
[root@server1 ~]# 140222 06:06:03 mysqld_safe Logging to '/var/lib/mysql/server1.soumya.com.err'.
140222 06:06:03 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql


Now the server is running with the –skip-grant-tables flag you can connect to it without a password and reset root password:

[root@server1 ~]# mysql --user=root mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.16 MySQL Community Server (GPL)

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> update user set Password=PASSWORD('newpassword') WHERE User='root';
Query OK, 4 rows affected (0.02 sec)
Rows matched: 4  Changed: 4  Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> exit
Bye

Now restart the mysql service and we are good to go..
[root@server1 ~]# service mysql stop
Shutting down MySQL..[  OK  ]
[root@server1 ~]# service mysql start

[root@server1 ~]# mysql -u root -pnewpassword
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.16 MySQL Community Server (GPL)

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>